DDO 169

---

title: "DDO 169" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["irregular-galaxies", "canes-venatici", "m51-group", "ugc-objects", "principal-galaxies-catalogue-objects"] description: "Galaxy in constellation Canes Venatici" topic_path: "science/astronomy" source: "https://en.wikipedia.org/wiki/DDO_169" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Galaxy in constellation Canes Venatici ::

::data[format=table title="Infobox Galaxy"]

Field	Value
name	DDO 169
image	File:UGC 8331 color cutout hst 10905 18 acs wfc f814w f606w sci.jpg
caption	DDO 169
epoch	J2000
constellation name	Canes Venatici
ra
dec
z	+260 km/s
dist_ly	6.03 / 8.23 Mpc
(19.7 / 26.8 million ly)
type	IAm
appmag_v	14.61
size_v	2.7′ × 0.9'
names	UGC 8331, PGC 46127
::

| name = DDO 169 | image = File:UGC 8331 color cutout hst 10905 18 acs wfc f814w f606w sci.jpg | caption = DDO 169 | epoch = J2000 | constellation name = Canes Venatici | ra = | dec = | z = +260 km/s | dist_ly = 6.03 / 8.23 Mpc (19.7 / 26.8 million ly) | type = IAm | appmag_v = 14.61 | size_v = 2.7′ × 0.9' | notes = | names = UGC 8331, PGC 46127 DDO 169 (also known as UGC 8331 or PGC 46127) is an irregular galaxy located in the constellation Canes Venatici. It is a member of the M51 Group of galaxies and measures approximately 5 × 1.5 kiloparsecs (16,000 × 5,000 lightyears). The galaxy's large-scale structure is very unorganized and it has two clusters of stars in its outer portions in addition to the cluster in the center. These clusters make it practically impossible to determine the galaxy's rotation curve and contributes to a large variation in distance figures that are derived with different methods. The exact distance to the galaxy is not known, although a 1998 paper estimated the distance as 8.23 megaparsecs.

References

References

1. "NED results for UGC 8331". NED via University of California.
2. (July 1998). "Distances to five resolved galaxies in the Canes Venatici cloud". Astronomy and Astrophysics Supplement Series.
3. (2009-01-27). "The rotation curves shapes of late-type dwarf galaxies". Astronomy and Astrophysics.

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::